docs: def check_submission_successful(self, submission_id=None):
          """Check if the last submission passes submission criteria.
  
          Args:
              submission_id (str, optional): submission of interest, defaults to
                  the last submission done with the account
  
          Return:
              bool: True if the submission passed all checks, False otherwise.
  
          Example:
              >>> api = NumerAPI(secret_key="..", public_id="..")
              >>> api.upload_predictions("predictions.csv")
              >>> api.check_submission_successful()
              True
          """
          status = self.submission_status(submission_id)
          # need to cast to bool to not return None in some cases.
          success = bool(status["concordance"]["value"])
          return success